<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .clock{
            width: 600px;
            height: 600px; 
            border: 1px solid;
            margin: 0 auto;
            border-radius: 50%;
            position: relative;
        }
        .box{
            width: 10px;
            height: 300px;
            border: 1px solid;
            position: absolute;
            left: 295px;
            transform: rotate(30deg);
            transform-origin: center bottom;
        }
        .box2{
            width: 10px;
            height: 300px;
            border: 1px solid;
            position: absolute;
            left: 295px;
            transform: rotate(60deg);
            transform-origin: center bottom;
        }
        .box3{
            width: 10px;
            height: 300px;
            border: 1px solid;
            position: absolute;
            left: 295px;
            transform: rotate(90deg);
            transform-origin: center bottom;
        }
    </style>
</head>
<body>
    <div class="clock">
        <div class="box"><span>1</span></div>
        <div class="box2"><span>2</span></div>
        <div class="box3"><span>3</span></div>

    </div>  
    <!-- div绘制一个圆形 -->
</body>
</html>